Arthur Brooks on why small New Year's resolutions can lead to lasting happiness

Arthur Brooks, a Harvard professor who studies the science of happiness, told "CBS Mornings" that while many people make New Year's resolutions, their success rate is low.

"About 50% of Americans make a New Year's resolution. Most of them fail. Most of them fail really quickly. And the big reason is because they are too big," Brooks said.

He advised that resolutions should be small and measurable.